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* [Bug breakpoints/30086] New: thread-specific breakpoints end up unnecessarily set in every inferior / address space
@ 2023-02-06 17:23 pedro at palves dot net
0 siblings, 0 replies; only message in thread
From: pedro at palves dot net @ 2023-02-06 17:23 UTC (permalink / raw)
To: gdb-prs
https://sourceware.org/bugzilla/show_bug.cgi?id=30086
Bug ID: 30086
Summary: thread-specific breakpoints end up unnecessarily set
in every inferior / address space
Product: gdb
Version: HEAD
Status: NEW
Severity: normal
Priority: P2
Component: breakpoints
Assignee: unassigned at sourceware dot org
Reporter: pedro at palves dot net
Target Milestone: ---
A thread-specific breakpoint really only needs to have locations for the
address/program space of the inferior which the thread belongs to. However, we
currently expand the breakpoint spec in every program space anyhow. Vis:
(gdb) b main thread 1.1
Breakpoint 1 at 0x1285: main. (2 locations)
(gdb) info breakpoints
Num Type Disp Enb Address What
1 breakpoint keep y <MULTIPLE> thread 1
stop only in thread 1.1
1.1 y 0x0000000000001285 in main at
gdb.multi/goodbye.c:61 inf 2
1.2 y 0x00005555555551f0 in main at
gdb.multi/hello.c:51 inf 1
Location 1.1 above is worse than useless, as it'll end up inserted and cause
inferior 2 to unnecessarily stop only to always be re-resumed.
We should instead end up with only one location for inferior 1, just like if
inferior 2 did not exist, like:
(gdb) b main thread 1.1
Breakpoint 1 at 0x5555555551f0: file gdb.multi/hello.c, line 51.
(gdb) info breakpoints
Num Type Disp Enb Address What
1 breakpoint keep y 0x00005555555551f0 in main at
gdb.multi/hello.c:51 thread 1
stop only in thread 1
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2023-02-06 17:23 [Bug breakpoints/30086] New: thread-specific breakpoints end up unnecessarily set in every inferior / address space pedro at palves dot net
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